Free Printable Photosynthesis

1.

What is the chemical formula for glucose?

a)

C6H12O6

b)

CO2

c)

H2O

d)

O2

2.

What is considered a "waste" product of photosynthesis?

a)

Glucose

b)

Water

c)

Oxygen

d)

Carbon dioxide

3.

What is the main goal of photosynthesis?

a)

Produce oxygen

b)

Produce glucose

c)

Absorb sunlight

d)

Release carbon dioxide

4.

What is the role of oxygen in the atmosphere according to the text?

a)

It is used by plants for photosynthesis

b)

It is a waste product

c)

It is used by humans and animals to convert food into energy

d)

It is absorbed by the soil

5.

What color do leaves appear due to chlorophyll?

a)

Red

b)

Blue

c)

Green

d)

Yellow

6.

What are chloroplasts referred to as in plant cells?

a)

Powerhouses

b)

Manufacturing factories

c)

Storage units

d)

Defense mechanisms

7.

What are the three things plants need to grow?

a)

Sunlight, water, and air

b)

Soil, nutrients, and light

c)

Water, soil, and carbon dioxide

d)

Sunlight, oxygen, and soil

8.

What are the products of photosynthesis?

a)

Water and carbon dioxide

b)

Glucose and oxygen gas

c)

Sunlight and water

d)

Oxygen and nitrogen

9.

What cycle is vital to the balance of nature?

a)

Water cycle

b)

Nitrogen cycle

c)

Carbon dioxide-oxygen cycle

d)

Rock cycle

10.

What do plants release back into the air during photosynthesis?

a)

Carbon dioxide

b)

Oxygen

c)

Nitrogen

d)

Hydrogen

11.

What do humans and animals give off when they exhale?

a)

Oxygen

b)

Carbon dioxide

c)

Nitrogen

d)

Hydrogen

12.

What is the source of all Earth's food according to the text?

a)

Animals

b)

Plants

c)

Water

d)

Soil

13.

What do plants produce in the form of food?

a)

Proteins

b)

Glucose

c)

Fats

d)

Vitamins

14.

What do plants absorb from the soil?

a)

Oxygen

b)

Water

c)

Carbon dioxide

d)

Nitrogen

15.

What do animals and humans take in from the air?

a)

Carbon dioxide

b)

Oxygen

c)

Nitrogen

d)

Hydrogen

16.

What is the formula for glucose?

a)

NaCl

b)

H₂O

c)

C₆H₁₂O₁₁

d)

C₆H₁₂O₆

17.

What is the role of chlorophyll in photosynthesis?

a)

It absorbs water

b)

It captures sunlight

c)

It releases oxygen

d)

It transports nutrients

18.

Pigment which 'fills' chloroplast. This pigment absorbs sunlight.

a)

nodules

b)

stomata

c)

chlorine

d)

chlorophyll

19.

What is the pigment in chloroplasts that performs photosynthesis?

a)

Chlorosynthesis

b)

Chlorophyll

c)

ADP

d)

Electron Transport

20.

What is the primary purpose of photosynthesis in plants?

a)

To produce oxygen for animals

b)

To convert light energy into chemical energy

c)

To absorb carbon dioxide from the atmosphere

d)

To create heat energy for the plant

21.

What is the main product of photosynthesis that is used as an energy source by plants?

a)

Oxygen

b)

Glucose

c)

Water

d)

Carbon dioxide

22.

Which of the following is NOT a product of photosynthesis?

a)

Glucose

b)

Oxygen

c)

Carbon dioxide

d)

None of the above

23.

Which of the following equations correctly represents the overall metabolic process of photosynthesis?

a)

$6CO_2 + 6H_2O \rightarrow C_6H_{12}O_6 + 6O_2$

b)

$C_6H_{12}O_6 + 6O_2 \rightarrow 6CO_2 + 6H_2O$

c)

$6O_2 + C_6H_{12}O_6 \rightarrow 6CO_2 + 6H_2O$

d)

$6H_2O + 6O_2 \rightarrow C_6H_{12}O_6 + 6CO_2$

24.

How does chlorophyll contribute to the photosynthesis process?

a)

It absorbs water from the soil

b)

It captures light energy from the sun

c)

It releases oxygen into the atmosphere

d)

It transports nutrients within the plant

Photosynthesis

Total questions: 24

Worksheet time: 13mins

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